Valve cooling device



April 18, 1933. w BADEN 1,904,669

VALVE COOLING DEVICE Filed Sept. 29, 1931 INVENTOR W Baden BY Q m mm ATTORNEY Patented Apr. 18, 1933 4,6

umrao STATES PATENT OFFICE WILLIAM BADEN, OF STOCKTON, CALIFORNIA VALVE COOLING DEVICE 7 Application filed September 29, 1931. Serial No. 565,721.

7 This invention relates to the poppet type v A further object of the invention is to valve of internal combustion engines and produce a simple and inexpensive device and particularly toameans for keepingthe valves yet one which will be exceedingly effective relatively cool when in operation. for the purpose for which it is designed. .5

It is well known that practically all valve These objects I accomplish by means of troubles such as warped valves and the failsuch structure and relative arrangement of me of the same to seat properly are due to parts as willfully appear by a perusalof the excessive heating of the valves, especially the following specification and claims. stems. The stems elongate when highly heat- In the drawing similarcharacters of refe-red and the necessary clearance between the encc indicate corresponding parts in the sevstems and the push rods is destroyed causeral views ing the valves to be held open. The stems Fig. 1 is a sectional elevation of my oil also expand in diameter, causing them to cooling device as applied to a valve of an L stick in their guides, and the valve heads cxhead engine. a v pand, relative to their seats, causing improper Fig. 2 is a similar view showing the cooling seating. It is also recognized that such device as applied to a valve of an overhead troubles are largely, if not entirely, elimivalve engine. nated by circulating a cooling medium Referring now more particularly to the through the valve stems and heads while characters of reference on the drawing and 0 the engine is in operation, and various atparticularly at present to'Fig. 1, the numeral 0 tempts have been made to accomplish this. 1 denotes a push rod slidably mounted in its A far as I am aware however all such bearing sleeve 2 as usual and provided on its previous attempts necessitated the employupper end with an adjustable screw 3. The mentof a special form of valve or push rod head of this screw forms the engaging means or an arrangement for mounting these parts for the lower end of the stem 4: of the valve 5. or operating the valves different from stand- In arranging my oil cooling devic in ard practice, and which rendered such den'ection with the standard parts the screw 3 Vices impracticable from a OIH IQ is bored from top to bottom so as to provide standpoint. The principal 0b] GCt my lIlan passage 6 A pray nozzle in the form vention therefore is to provide an 011 cooling f a t b 7 i Secured i th upper d f arrangement for the Valve h l and Stems the screw in central alinement with the valve wh1ch avo1ds the above ob ect10nable feat d ge 6, and projects upwardly tures 111 h an operatmg mechanlsm of into the stem which is provided with a rela- 5 Standard 10mm and f and P rods of tively large bore 8 in which the tube is disthe standard Conventlonal type may be posed in clearance relation. The bore extends y The Valves are free to rotate. as 18 from the bottom of the stem into the head ti and fi j it z kf which is provided with a relatively large 1S 110W e W1 915m ma pal diameter chamber 864 with which the bore I of the cooling structure. The device may t T1 t b t t h t also be installed in any gas engine whether clQmmumca h u g mi g S or of the L or T head type or the overhead valve f gfiggs g g g elupper n 0 t e C amber I c type by merely a 681mm amount of The passage 6 communicates with the holwork to the valves and the push rods or v r rocker arms without actually having to re- 10W area 9 1n the push rod below the Screw 45 place these parts with others of a diiferent 3 from whlch areaa P 10 leads to a f or d i Th d i th f may cumferential groove 11 out about the outer not only be incorporated in any engines withperiphery ofthe push rod. This groove comout necessitating any changes in engine demunicates with the ad acent end of a fitt1ng sign, but may be readily installed in any en- 12 secured in the sleeve 2 and to which an gine already in use. oil supply pipe 13 is connected. TlllS pipe leads from and is connected to the oil pressure system found on all modern engines.

l/Vhen the engine is operated therefore it will be seen that a constant circulation of relatively cool oil under pressure will flow from the pipe 13 up through the nozzle 7 and discharge into the chamber 8a. The oil will then fiow down about the tube but inside the valve stem to the lower end of the bore 8. At this end the release of the oil from the bore is had .without depending on the clearance between the push rod and the stem by means of radial ports 14 cut in the bottom of the stem and communicating with the bore 8. The length and positioning of the groove 11 relative to the fitting 12 and the upper end of the sleeve 2 is such that said groove is always in communication with the fitting and never projects above the sleeve with the vertical movement of the push rod. The oil pressure necessary to force the oil up and out of the nozzle 7 is therefore never disturbed. It will therefore be seen that all standard parts now employed in connection with valve operation are retained and may be easily altered in installing the cooling device on an engine already built. The push rod is free to rotate, the screw 3 may be adjusted, and the valve is also free to rotate, since there is no more direct connection between the push rod and the valve than is at present the case. Also, nothing interferes with the direct axial engagement of the stem with the push rod, so that there is no tendency for the valve to be canted sideways.

In engine operation, the valves of course attain a high degree of heat first, or before the other parts of the engine have reached their normal temperature. The circulation of the cool oil through the valves causes their temperature to be held down and to be built up gradually, the excess heat being carried away by the oil leaving the valve stems. As a result the engine parts attain and hold practically the same temperature and engine operation in various respects is improved.

In connection with the valve of an overhead valve engine the installation or adaptation of the oil cooling device thereto is even simpler than in an L head engine. Such an adaptation is shown in Fig. 2. In this case the shaft 15 which supports the valve actuating rocker arm 16 is already hollow and is connected with the'force feed oiling system .of the engine; and the rocker arm has a circumferential groove 17 about the shaft which is in communication with the oil passage therethrough.

Vith an engine of this character the oil feed nozzle 7 a depends from the outer end of the rocker arm and into the hollow valve stem 4a. A flexible mounting of this nozzle on the rocker arm is necessary, since it must hang straight with any rocking of the arm. To do this a pocket 18 larger than the nozzle tube is drilled in the arm from the top to a point near the bottom. The top of the nozzle, which is inserted from above, is flared out as shown at 19 so as to swivelly rest on the bottom of the pocket. The hole in the arm below the pocket and through which the nozzle projects is shaped so that the nozzle may have a certain amount of swivel movement. After the nozzle is in place, the pocket is plugged on top so as to be oil tight.

A passage 20 is drilled in the rocker arm or some other suitable form of conduit provided between the pocket and the groove 17. This is the only work which has to be done to apply my cooling device to an engine of this type, since the passage 20 of course provides the necessary communication between the nozzle and the forceful flow of oil constantly circulating through the rocker arm shaft.

From the foregoing description it will be readily seen that I have produced such a device as' substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to se cure by Letters Patent is:

1. In combination, a valve having a stem, a valve actuating member engaging the out er end of the stem, said stem being bored from its outer end to adjacent the valve head, a spray nozzle tube secured in said member and projecting into the stem bore in clearance relation thereto, and means to supply a liquid to the member to communicate with the adj acent end of the tube.

2. In combination, a valve having a stem, a valve actuating member engaging the outer end of the stem, said stem being bored from its outer end to adjacent the valve head, a spray nozzle tube secured in said member and projecting into the stem bore in clearance relation thereto, a liquid conduit, and passage means in the member from the conduit to the adjacent end of the tube.

3. In combination a valve having a hollo stem, a movable hollow actuating member positioned for engagement with the outer end of the stem, a conduit mounted in and projecting from the stem engaging end of the member into said stem and means to feed a liquid to said member.

4. In combination a valve having a hollow stem, a push rod alined with the stem, a tubular adjustable head in the rod to engage the outer end of the stem, a conduit secured in said head communicating with the bore of the same and projecting into the valve stem, a passage in the rod below the head and establishing communication between the head and the periphery of the rod,\a guide sleeve for the rod covering the outer end of the passage, and an oil conduit connected to the sleeve to communicate with said passage.

5. In combination a valve having a hollow upstanding stem, a rocker arm overhanging the upper end of the stem to engage the same, said arm having an oil passage therein, means to feed a liquid to said passage and a con duit swivelly connected to the outer end of the arm and depending therefrom into the valve stem.

In testimony whereof I afiix my signature WILLIAM BADEN. 

